MFC选修 计算器实验报告

六、源程序清单、测试数据、结果主要代码：//1-9与0的消息响应函数相同，如下：voidCCaculatorDlg::OnButton0(){ //TODO:Addyourcontrolnotificationhandlercodehere m_StrBegin=m_StrBegin+"0"; if(!m_IsCheckPoint) m_DspEdit.OnDisplay(m_StrBegin+"."); else m_DspEdit.OnDisplay(m_StrBegin);}//清除显示框中内容voidCCaculatorDlg::OnButtonClr(){ //TODO:Addyourcontrolnotificationhandlercodehere m_IsCheckPoint=false; m_StrBegin=""; m_begin=0.0; m_end=0.0; m_bit=0; m_DspEdit.OnDisplay("0."); }//实现“+”运算，“-、*、/、平方、开方”等运算的消息函数大体相同voidCCaculatorDlg::OnButtonPlus(){ //TODO:Addyourcontrolnotificationhandlercodehere Result(); m_bit=1;}//核心函数：实现按钮到显示功能的中间计算过程VoidCCaculatorDlg::Result()//用来处理按下符号键时的函数，是计算的核心函数{m_IsCheckPoint=false; m_begin=atof(m_StrBegin);//将字符串转化为浮点数，确保精度 switch(m_bit) { case1: //处理+号 m_end+=m_begin; break; case2: //处理-号 m_end-=m_begin; break; case3: //处理*号，即乘法 m_end*=m_begin; break; case4: //处理/号，即除法 if(m_begin==0) { m_DspEdit.OnDisplay("除数不能为零！"); return; } m_end/=m_begin; break; case5: //处理sqrt号，即开方 if(m_end<0) { m_DspEdit.OnDisplay("函数输入无效！"); return; } m_end=sqrt(m_end); break; case6: //处理1/x号，即求倒数 m_end=1/m_end; case7: //处理=号 break; case8: //处理sin号 m_end=sin(m_end); break; case9: //处理cos号 m_end=cos(m_end); break; case10: //处理tan号 m_end=tan(m_end); break; case11: //处理x^2号，即平方 m_end=m_end*m_end; break; case12: //处理x^3号，即立方 m_end=m_end*m_end*m_end; break; case13: //处理x^y号，即求x的y次方 m_end=pow(m_end,m_begin); break; case14: //处理Exp号，即求e的x次方 m_end=exp(m_end); break; case15: //处理ln号 if(m_end<=0) { m_DspEdit.OnDisplay("函数输入无效！"); return; } m_end=log(m_end); break; case16: //处理log号 if(m_end<=0) { m_DspEdit.OnDisplay("函数输入无效！"); return; } m_end=log10(m_end); break; default: // m_end=m_begin; break; } m_begin=0.0; m_bit=0; m_StrBegin=""; inti=sprintf(m_buffer,"%10.12f",m_end);//将结果转换为字符串 TrimZero(m_buffer,i);//去掉字符串尾部多余的零 m_DspEdit.OnDisplay(m_buffer);}//实现简单和扩展计算器的切换功能voidCCaculatorDlg::OnExtend(){//功能拓展按钮 //TODO:Addyourcommandhandlercodehere CRectrect; if(!m_IsExtend) { SetWindowPos(&wndTop,0,0,oldrect.Width(),oldrect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_DspEdit.GetWindowRect(&rect); m_DspEdit.SetWindowPos(NULL,rect.left,rect.top,361,rect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_DspStatic.GetWindowRect(&rect); m_DspStatic.SetWindowPos(NULL,rect.left,rect.top,381,rect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_Menu->ModifyMenu(ID_EXTEND,MF_BYCOMMAND|MF_STRING,ID_EXTEND,"标准"); m_IsExtend=TRUE; } else { SetWindowPos(&wndTop,0,0,newrect.Width(),newrect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_DspEdit.GetWindowRect(&rect); m_DspEdit.SetWindowPos(NULL,rect.left,rect.top,182,rect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_DspStatic.GetWindowRect(&rect); m_DspStatic.SetWindowPos(NULL,rect.left,rect.top,202,rect.Height(),SWP_NOMOVE|SWP_NOZORDER); m_Menu->ModifyMenu(ID_EXTEND,MF_BYCOMMAND|MF_STRING,ID_EXTEND,"扩展"); m_IsExtend=FALSE; }}voidCCaculatorDlg::OnButtonDot(){//小数点的处理 //TODO:Addyourcontrolnotificationh